Moon Gels can be washed in soap and water and rejuvenated for a spell and Bermuda has found the kids little gels do the job as well.
You can also use a business card at the bottom of the batter head and achieve the same thing

+1.............I had some old ones, washed them with soap and water..........let dry and they worked like new. As to losing them, I always place my "extras" inside my cowbell..............they stay fine, I always know where they are and I can grab them quickly if I need to.